﻿using System;
using System.Collections;
using System.Data;
using System.IO;
using System.Xml;

namespace Evan.Common
{
    /// <summary>
    /// 
    /// </summary>
    public class XMLHelp
    {
        /// <summary>
        /// 从文件中加载XML
        /// </summary>
        public class XMLProcess
        {
            #region 构造函数
            public XMLProcess()
            { }

            public XMLProcess(string strPath)
            {
                this._XMLPath = strPath;
            }

            #endregion

            #region 公有属性
            private string _XMLPath;
            public string XMLPath
            {
                get { return this._XMLPath; }
            }

            #endregion

            #region 私有方法

        

            /// <summary>
            /// 导入XML文件
            /// </summary>
            private XmlDocument XMLLoad()
            {
                string XMLFile = XMLPath;
                XmlDocument xmldoc = new XmlDocument();
                try
                {
                    string filename = AppDomain.CurrentDomain.BaseDirectory.ToString() + XMLFile;
                    if (File.Exists(filename)) xmldoc.Load(filename);
                }
                catch{ }
                return xmldoc;
            }

            /// <summary>
            /// 导入XML文件
            /// </summary>
            /// <param name="strPath">XML文件路径</param>
            private static XmlDocument XMLLoad(string strPath)
            {
                XmlDocument xmldoc = new XmlDocument();
                try
                {
                    string filename = AppDomain.CurrentDomain.BaseDirectory.ToString() + strPath;
                    if (File.Exists(filename)) xmldoc.Load(filename);
                }
                catch
                { }
                return xmldoc;
            }

            /// <summary>
            /// 返回完整路径
            /// </summary>
            /// <param name="strPath">Xml的路径</param>
            private static string GetXmlFullPath(string strPath)
            {
                if (strPath.IndexOf(":") > 0)
                {
                    return strPath;
                }
                else
                {
                    return System.Web.HttpContext.Current.Server.MapPath(strPath);
                }
            }
            #endregion

            #region 读取数据
            /// <summary>
            /// 读取指定节点的数据
            /// </summary>
            /// <param name="node">节点</param>
            /// 使用示列:
            /// XMLProsess.Read("/Node", "")
            /// XMLProsess.Read("/Node/Element[@Attribute='Name']")
            public string Read(string node)
            {
                string value = "";
                try
                {
                    XmlDocument doc = XMLLoad();
                    XmlNode xn = doc.SelectSingleNode(node);
                    value = xn.InnerText;
                }
                catch { }
                return value;
            }

            /// <summary>
            /// 读取指定路径和节点的串联值
            /// </summary>
            /// <param name="path">路径</param>
            /// <param name="node">节点</param>
            /// 使用示列:
            /// XMLProsess.Read(path, "/Node", "")
            /// XMLProsess.Read(path, "/Node/Element[@Attribute='Name']")
            public static string Read(string path, string node)
            {
                string value = "";
                try
                {
                    XmlDocument doc = XMLLoad(path);
                    XmlNode xn = doc.SelectSingleNode(node);
                    value = xn.InnerText;
                }
                catch { }
                return value;
            }

            /// <summary>
            /// 读取指定路径和节点的属性值
            /// </summary>
            /// <param name="path">路径</param>
            /// <param name="node">节点</param>
            /// <param name="attribute">属性名，非空时返回该属性值，否则返回串联值</param>
            /// 使用示列:
            /// XMLProsess.Read(path, "/Node", "")
            /// XMLProsess.Read(path, "/Node/Element[@Attribute='Name']", "Attribute")
            public static string Read(string path, string node, string attribute)
            {
                string value = "";
                try
                {
                    XmlDocument doc = XMLLoad(path);
                    XmlNode xn = doc.SelectSingleNode(node);
                    value = (attribute.Equals("") ? xn.InnerText : xn.Attributes[attribute].Value);
                }
                catch { }
                return value;
            }

            /// <summary>
            /// 获取某一节点的所有孩子节点的值
            /// </summary>
            /// <param name="node">要查询的节点</param>
            public string[] ReadAllChildallValue(string node)
            {
                int i = 0;
                string[] str = { };
                XmlDocument doc = XMLLoad();
                XmlNode xn = doc.SelectSingleNode(node);
                XmlNodeList nodelist = xn.ChildNodes;  //得到该节点的子节点
                if (nodelist.Count > 0)
                {
                    str = new string[nodelist.Count];
                    foreach (XmlElement el in nodelist)//读元素值
                    {
                        str[i] = el.Value;
                        i++;
                    }
                }
                return str;
            }

            /// <summary>
            /// 获取某一节点的所有孩子节点的值
            /// </summary>
            /// <param name="node">要查询的节点</param>
            public XmlNodeList ReadAllChild(string node)
            {
                XmlDocument doc = XMLLoad();
                XmlNode xn = doc.SelectSingleNode(node);
                XmlNodeList nodelist = xn.ChildNodes;  //得到该节点的子节点
                return nodelist;
            }

            /// <summary> 
            /// 读取XML返回经排序或筛选后的DataView
            /// </summary>
            /// <param name="strWhere">筛选条件，如:"name='kgdiwss'"</param>
            /// <param name="strSort"> 排序条件，如:"Id desc"</param>
            public DataView GetDataViewByXml(string strWhere, string strSort)
            {
                try
                {
                    string XMLFile = this.XMLPath;
                    string filename = AppDomain.CurrentDomain.BaseDirectory.ToString() + XMLFile;
                    DataSet ds = new DataSet();
                    ds.ReadXml(filename);
                    DataView dv = new DataView(ds.Tables[0]); //创建DataView来完成排序或筛选操作	
                    if (strSort != null)
                    {
                        dv.Sort = strSort; //对DataView中的记录进行排序
                    }
                    if (strWhere != null)
                    {
                        dv.RowFilter = strWhere; //对DataView中的记录进行筛选，找到我们想要的记录
                    }
                    return dv;
                }
                catch (Exception)
                {
                    return null;
                }
            }

            /// <summary>
            /// 读取XML返回DataSet
            /// </summary>
            /// <param name="strXmlPath">XML文件相对路径</param>
            public DataSet GetDataSetByXml(string strXmlPath)
            {
                try
                {
                    DataSet ds = new DataSet();
                    ds.ReadXml(GetXmlFullPath(strXmlPath));
                    if (ds.Tables.Count > 0)
                    {
                        return ds;
                    }
                    return null;
                }
                catch (Exception)
                {
                    return null;
                }
            }
            #endregion

            #region 插入数据
            /// <summary>
            /// 插入数据
            /// </summary>
            /// <param name="path">路径</param>
            /// <param name="node">节点</param>
            /// <param name="element">元素名，非空时插入新元素，否则在该元素中插入属性</param>
            /// <param name="attribute">属性名，非空时插入该元素属性值，否则插入元素值</param>
            /// <param name="value">值</param>
            /// 使用示列:
            /// XMLProsess.Insert(path, "/Node", "Element", "", "Value")
            /// XMLProsess.Insert(path, "/Node", "Element", "Attribute", "Value")
            /// XMLProsess.Insert(path, "/Node", "", "Attribute", "Value")
            public static void Insert(string path, string node, string element, string attribute, string value)
            {
                try
                {
                    XmlDocument doc = new XmlDocument();
                    doc.Load(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
                    XmlNode xn = doc.SelectSingleNode(node);
                    if (element.Equals(""))
                    {
                        if (!attribute.Equals(""))
                        {
                            XmlElement xe = (XmlElement)xn;
                            xe.SetAttribute(attribute, value);
                        }
                    }
                    else
                    {
                        XmlElement xe = doc.CreateElement(element);
                        if (attribute.Equals(""))
                            xe.InnerText = value;
                        else
                            xe.SetAttribute(attribute, value);
                        xn.AppendChild(xe);
                    }
                    doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
                }
                catch { }
            }

            /// <summary>
            /// 插入数据
            /// </summary>
            /// <param name="path">路径</param>
            /// <param name="node">节点</param>
            /// <param name="element">元素名，非空时插入新元素，否则在该元素中插入属性</param>
            /// <param name="strList">由XML属性名和值组成的二维数组</param>
            public static void Insert(string path, string node, string element, string[][] strList)
            {
                try
                {
                    XmlDocument doc = new XmlDocument();
                    doc.Load(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
                    XmlNode xn = doc.SelectSingleNode(node);
                    XmlElement xe = doc.CreateElement(element);
                    string strAttribute = "";
                    string strValue = "";
                    for (int i = 0; i < strList.Length; i++)
                    {
                        for (int j = 0; j < strList[i].Length; j++)
                        {
                            if (j == 0)
                                strAttribute = strList[i][j];
                            else
                                strValue = strList[i][j];
                        }
                        if (strAttribute.Equals(""))
                            xe.InnerText = strValue;
                        else
                            xe.SetAttribute(strAttribute, strValue);
                    }
                    xn.AppendChild(xe);
                    doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
                }
                catch { }
            }

            /// <summary>
            /// 插入一行数据
            /// </summary>
            /// <param name="strXmlPath">XML文件相对路径</param>
            /// <param name="Columns">要插入行的列名数组，如：string[] Columns = {"name","IsMarried"};</param>
            /// <param name="ColumnValue">要插入行每列的值数组，如：string[] ColumnValue={"XML大全","false"};</param>
            /// <returns>成功返回true,否则返回false</returns>
            public static bool WriteXmlByDataSet(string strXmlPath, string[] Columns, string[] ColumnValue)
            {
                try
                {
                    //根据传入的XML路径得到.XSD的路径，两个文件放在同一个目录下
                    string strXsdPath = strXmlPath.Substring(0, strXmlPath.IndexOf(".")) + ".xsd";
                    DataSet ds = new DataSet();
                    ds.ReadXmlSchema(GetXmlFullPath(strXsdPath)); //读XML架构，关系到列的数据类型
                    ds.ReadXml(GetXmlFullPath(strXmlPath));
                    DataTable dt = ds.Tables[0];
                    DataRow newRow = dt.NewRow();                 //在原来的表格基础上创建新行
                    for (int i = 0; i < Columns.Length; i++)      //循环给一行中的各个列赋值
                    {
                        newRow[Columns[i]] = ColumnValue[i];
                    }
                    dt.Rows.Add(newRow);
                    dt.AcceptChanges();
                    ds.AcceptChanges();
                    ds.WriteXml(GetXmlFullPath(strXmlPath));
                    return true;
                }
                catch (Exception)
                {
                    return false;
                }
            }
            #endregion

            #region 修改数据
            /// <summary>
            /// 修改指定节点的数据
            /// </summary>
            /// <param name="node">节点</param>
            /// <param name="value">值</param>
            public void Update(string node, string value)
            {
                try
                {
                    XmlDocument doc = XMLLoad();
                    XmlNode xn = doc.SelectSingleNode(node);
                    xn.InnerText = value;
                    doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + XMLPath);
                }
                catch { }
            }

            /// <summary>
            /// 修改指定节点的数据
            /// </summary>
            /// <param name="path">路径</param>
            /// <param name="node">节点</param>
            /// <param name="value">值</param>
            /// 使用示列:
            /// XMLProsess.Insert(path, "/Node","Value")
            /// XMLProsess.Insert(path, "/Node","Value")
            public static void Update(string path, string node, string value)
            {
                try
                {
                    XmlDocument doc = XMLLoad(path);
                    XmlNode xn = doc.SelectSingleNode(node);
                    xn.InnerText = value;
                    doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
                }
                catch { }
            }

            /// <summary>
            /// 修改指定节点的属性值(静态)
            /// </summary>
            /// <param name="path">路径</param>
            /// <param name="node">节点</param>
            /// <param name="attribute">属性名，非空时修改该节点属性值，否则修改节点值</param>
            /// <param name="value">值</param>
            /// 使用示列:
            /// XMLProsess.Insert(path, "/Node", "", "Value")
            /// XMLProsess.Insert(path, "/Node", "Attribute", "Value")
            public static void Update(string path, string node, string attribute, string value)
            {
                try
                {
                    XmlDocument doc = XMLLoad(path);
                    XmlNode xn = doc.SelectSingleNode(node);
                    XmlElement xe = (XmlElement)xn;
                    if (attribute.Equals(""))
                        xe.InnerText = value;
                    else
                        xe.SetAttribute(attribute, value);
                    doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
                }
                catch { }
            }

            /// <summary>
            /// 更改符合条件的一条记录
            /// </summary>
            /// <param name="strXmlPath">XML文件路径</param>
            /// <param name="Columns">列名数组</param>
            /// <param name="ColumnValue">列值数组</param>
            /// <param name="strWhereColumnName">条件列名</param>
            /// <param name="strWhereColumnValue">条件列值</param>
            public static bool UpdateXmlRow(string strXmlPath, string[] Columns, string[] ColumnValue, string strWhereColumnName, string strWhereColumnValue)
            {
                try
                {
                    string strXsdPath = strXmlPath.Substring(0, strXmlPath.IndexOf(".")) + ".xsd";
                    DataSet ds = new DataSet();
                    ds.ReadXmlSchema(GetXmlFullPath(strXsdPath));//读XML架构，关系到列的数据类型
                    ds.ReadXml(GetXmlFullPath(strXmlPath));

                    //先判断行数
                    if (ds.Tables[0].Rows.Count > 0)
                    {
                        for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                        {
                            //如果当前记录为符合Where条件的记录
                            if (ds.Tables[0].Rows[i][strWhereColumnName].ToString().Trim().Equals(strWhereColumnValue))
                            {
                                //循环给找到行的各列赋新值
                                for (int j = 0; j < Columns.Length; j++)
                                {
                                    ds.Tables[0].Rows[i][Columns[j]] = ColumnValue[j];
                                }
                                ds.AcceptChanges();                     //更新DataSet
                                ds.WriteXml(GetXmlFullPath(strXmlPath));//重新写入XML文件
                                return true;
                            }
                        }

                    }
                    return false;
                }
                catch (Exception)
                {
                    return false;
                }
            }
            #endregion

            #region 删除数据
            /// <summary>
            /// 删除节点值
            /// </summary>
            /// <param name="path">路径</param>
            /// <param name="node">节点</param>
            /// 使用示列:
            /// XMLProsess.Delete(path, "/Node", "")
            /// XMLProsess.Delete(path, "/Node", "Attribute")
            public static void Delete(string path, string node)
            {
                try
                {
                    XmlDocument doc = XMLLoad(path);
                    XmlNode xn = doc.SelectSingleNode(node);
                    xn.ParentNode.RemoveChild(xn);
                    doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
                }
                catch { }
            }

            /// <summary>
            /// 删除数据
            /// </summary>
            /// <param name="path">路径</param>
            /// <param name="node">节点</param>
            /// <param name="attribute">属性名，非空时删除该节点属性值，否则删除节点值</param>
            /// 使用示列:
            /// XMLProsess.Delete(path, "/Node", "")
            /// XMLProsess.Delete(path, "/Node", "Attribute")
            public static void Delete(string path, string node, string attribute)
            {
                try
                {
                    XmlDocument doc = XMLLoad(path);
                    XmlNode xn = doc.SelectSingleNode(node);
                    XmlElement xe = (XmlElement)xn;
                    if (attribute.Equals(""))
                        xn.ParentNode.RemoveChild(xn);
                    else
                        xe.RemoveAttribute(attribute);
                    doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
                }
                catch { }
            }

            /// <summary>
            /// 删除所有行
            /// </summary>
            /// <param name="strXmlPath">XML路径</param>
            public static bool DeleteXmlAllRows(string strXmlPath)
            {
                try
                {
                    DataSet ds = new DataSet();
                    ds.ReadXml(GetXmlFullPath(strXmlPath));
                    if (ds.Tables[0].Rows.Count > 0)
                    {
                        ds.Tables[0].Rows.Clear();
                    }
                    ds.WriteXml(GetXmlFullPath(strXmlPath));
                    return true;
                }
                catch (Exception)
                {
                    return false;
                }
            }

            /// <summary>
            /// 通过删除DataSet中指定索引行，重写XML以实现删除指定行
            /// </summary>
            /// <param name="strXmlPath"></param>
            /// <param name="iDeleteRow">要删除的行在DataSet中的Index值</param>
            public static bool DeleteXmlRowByIndex(string strXmlPath, int iDeleteRow)
            {
                try
                {
                    DataSet ds = new DataSet();
                    ds.ReadXml(GetXmlFullPath(strXmlPath));
                    if (ds.Tables[0].Rows.Count > 0)
                    {
                        ds.Tables[0].Rows[iDeleteRow].Delete();
                    }
                    ds.WriteXml(GetXmlFullPath(strXmlPath));
                    return true;
                }
                catch (Exception)
                {
                    return false;
                }
            }

            /// <summary>
            /// 删除指定列中指定值的行
            /// </summary>
            /// <param name="strXmlPath">XML相对路径</param>
            /// <param name="strColumn">列名</param>
            /// <param name="ColumnValue">指定值</param>
            public static bool DeleteXmlRows(string strXmlPath, string strColumn, string[] ColumnValue)
            {
                try
                {
                    DataSet ds = new DataSet();
                    ds.ReadXml(GetXmlFullPath(strXmlPath));
                    if (ds.Tables[0].Rows.Count > 0)
                    {
                        //判断行多还是删除的值多，多的for循环放在里面
                        if (ColumnValue.Length > ds.Tables[0].Rows.Count)
                        {
                            for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                            {
                                for (int j = 0; j < ColumnValue.Length; j++)
                                {
                                    if (ds.Tables[0].Rows[i][strColumn].ToString().Trim().Equals(ColumnValue[j]))
                                    {
                                        ds.Tables[0].Rows[i].Delete();
                                    }
                                }
                            }
                        }
                        else
                        {
                            for (int j = 0; j < ColumnValue.Length; j++)
                            {
                                for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                                {
                                    if (ds.Tables[0].Rows[i][strColumn].ToString().Trim().Equals(ColumnValue[j]))
                                    {
                                        ds.Tables[0].Rows[i].Delete();
                                    }
                                }
                            }
                        }
                        ds.WriteXml(GetXmlFullPath(strXmlPath));
                    }
                    return true;
                }
                catch (Exception)
                {
                    return false;
                }
            }
            #endregion
        }


    }


 

}
